18124609 has 2 divisors, whose sum is σ = 18124610. Its totient is φ = 18124608.

The previous prime is 18124607. The next prime is 18124619. The reversal of 18124609 is 90642181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11075584 + 7049025 = 3328^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 18124609 - 2¹ = 18124607 is a prime.

Together with 18124607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18124607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062304 + 9062305.

It is an arithmetic number, because the mean of its divisors is an integer number (9062305).

Almost surely, 2^18124609 is an apocalyptic number.

It is an amenable number.

18124609 is a deficient number, since it is larger than the sum of its proper divisors (1).

18124609 is an equidigital number, since it uses as much as digits as its factorization.

18124609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18124609 is about 4257.3006706128. The cubic root of 18124609 is about 262.6775047349.

The spelling of 18124609 in words is "eighteen million, one hundred twenty-four thousand, six hundred nine".